Checking oil pump for wear

[doitwright]

I purchased what was described as a NOS oil pump. Now that I have received it. I am questioning if it is new or worn out. Should There be any back and forth play in the gears? I demonstrate what I am talking about in this video.

https://drive.google.com/file/d/1Uegm-MRs9gWTV7b-6MCdy5fAmg6LxXMN/view?usp=drivesdk

[mbzse]

.../...oil pump. Now that I have received it. I am questioning if it is new or worn out. Should There be any back and forth play in the gears?.../...

There are specifications in the workshop manual (BBB).
See attached. One can use blade or pin feeler gauges, micrometer etc in order to evaluate status of a used engine oil pump.

[doitwright]

The question is: Is backlash normal for a new pump?

[Benz Dr.]

The question is: Is backlash normal for a new pump?

Yes, you would need a little bit to keep it from binding. Radial play or backlash is in the .002 - .003" range so it's not very much.

[doitwright]

Thank you Hans and Dan for the information. It looks like the pump is a keeper.